Collapsible funnel



FIG. 1 is a perspective view of a collapsible funnel showing my new design;

FIG. 2 is a side elevational view, the opposite side being identical in appearance to that shown in FIG. 2;

FIG. 3 is a rear elevational view;

FIG. 4 is a front elevational view;

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view. 

The ornamental design for a collapsible funnel, as shown and described. 